The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2019
Filed:
Jun. 04, 2018
Nxp Usa, Inc., Austin, TX (US);
Kumar Abhishek, Austin, TX (US);
Srikanth Jagannathan, Austin, TX (US);
Shanaka Pradeep Yapa Appuhamillage Don, Austin, TX (US);
NXP USA, Inc., Austin, TX (US);
Abstract
The embodiments described herein provide analog-to-digital converters and methods that can reduce the likelihood of excessive voltage drop during the conversion of weakly driven signals while still providing the ability to perform an accurate analog-to-digital conversion. In general, the embodiments described herein reduce the likelihood of excessive voltage drop during the conversion of weakly driven signals by pre-charging the sampling capacitor used in the conversion. For example, the embodiments can apply the buffered input signal apply to the sampling capacitor for a first sampling cycle to pre-charge the sampling capacitor, and then directly apply the unbuffered input signal to the sampling capacitor for a second sampling cycle to final-charge the sampling capacitor. With the sampling capacitor charged using the two stage charging, a digital output corresponding to the charge of the sampling capacitor is generated.